time magazine features vice president joe biden, gabby giffords, and the new york city mayor michael bloomberg. joining us to explain the cover, rick stangel. thanks very much. tell us why you put these individuals, these three people on the cover. >> i think, wolf, they represent the sort of three legs of the stool of people who are trying to combat gun violence of the gr progressive side. mayor bloomberg has been out spoken for a very long time about reducing gun violence and he will be contributing money personally to a super pac that will help candidates who are in favor of gun laws and, of course, gabby giffords herself is a sim poll of the terrible tragedies that can happen from deranged people using guns. >> they are the three individuals on this fight right now. they didn't get together for a formal photo shoot for the cover, did they? >> no. we shot them individually and pieced them together. congresswoman giffords couldn't come to washington. otherwise i think we would have gotten them all together. >> how difficult will it be -- and your reporters have done a lot of report